Gas filling and dispensing device, vessel with such device, and operational circuit

Abstract

The invention relates to a gas filling and dispensing device that comprises a body to be positioned in the opening of a pressurized gas storage tank, a gas-tapping circuit extending between a first upstream end to be connected to the inside of the tank and a second downstream end to be connected to a gas user, wherein the tapping circuit includes a first insulation valve, the device further including a safety valve subjected to the tank pressure for blocking or selectively opening a passage for the gas from the tank towards a discharge area based on the temperature and/or pressure of the gas in the tank relative to at least one predetermined threshold, characterized in that the discharge area of the safety valve is located upstream from the first insulation valve.

1 . A gas filling and dispensing device comprising a body adapted for operable fluid connection to an orifice of a pressurized-gas storage reservoir, a gas withdrawing circuit running between an upstream first end adapted for operable fluid connection to an inside of the reservoir and a downstream second end adapted to be connected to a user of the gas, the withdrawing circuit comprising a first isolating valve, the device further comprising a safety relief valve configured to be subjected to the pressure in the reservoir, wherein the safety relief valve is adapted to close or open a passage for the gas from the reservoir to a discharge zone according to the temperature and/or the pressure of the gas in the reservoir with respect to at least one set threshold, characterized in that the discharge zone of the safety relief valve is situated upstream of the first isolating valve. 
     
     
         2 . The filling device of  claim 1 , wherein the withdrawing circuit comprises a pressure regulator, a low-pressure chamber and the first isolating valve which are arranged in series in that order from the upstream to downstream end, the discharge zone of the safety relief valve being situated downstream of the pressure regulator. 
     
     
         3 . The device of  claim 1 , wherein the safety relief valve is situated in a pipe having a downstream end connected upstream of the first isolating valve and an upstream end connected, when the device is mounted on a reservoir, to the inside of the reservoir. 
     
     
         4 . The device of  claim 1 , wherein the gas withdrawing circuit comprises a second isolating valve. 
     
     
         5 . The device of  claim 4 , wherein the second isolating valve is arranged between the pressure regulator and the first isolating valve. 
     
     
         6 . The device of  claim 1 , wherein the safety relief valve closes off the passage for the gas to the discharge zone when the safety relief valve is subjected to a temperature and/or a pressure which is below the threshold. 
     
     
         7 . The device of  claim 1 , wherein the safety relief valve comprises a valve of the Pressure Relief Device type. 
     
     
         8 . The device of  claim 1 , wherein the safety relief valve comprises an element that is sensitive to temperature and/or sensitive to shocks, the element configured within the safety relief valve to operate to open the passage in the event of an excessive temperature or an excessive shock. 
     
     
         9 . A pressurized-gas vessel comprising an orifice, wherein it comprises a gas filling and dispensing device of  claim 1  arranged in the orifice. 
     
     
         10 . An assembly comprising a circuit for using a pressurized gas and a pressurized gas vessel of  claim 9 , the vessel being selectively connectable to the user circuit via the gas filling and dispensing device, the circuit comprising a mechanism that forms a high-pressure safety relief valve adapted to discharge the pressurized exhaust gas to the atmosphere or to a set safe zone.